Phylloquinone and related radical anions studied by pulse electron nuclear double resonance spectroscopy at 34 GHz and density functional theory

Article Abstract:

The semiquninone radical anions B[Q.sup..-], N[Q.sup..-], V[K3.sup..-] and V[K1.sup..-] in frozen propanol solution is measured using pulsed Q-band electron nuclear double resonance spectroscopy. The hyperfine (hf) tensors study concluded that four solvent molecules are coordinated through hydrogen bonds to the quinone oxygens but in V[K3.sup..-] and V[K1.sup..-] some of these hydrogen bonds do not lie in the plane of the quinone.

All Other Basic Organic Chemical Manufacturing, Industrial Organic Chemicals, Propanols, Hydrogen bonding, Hydrogen bonds, Quinone, Quinones

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Dynamics and ordering in the columnar mesophases of octa-alkyloxy orthocylophane: A carbon-13 NMR investigation

Article Abstract:

The suitability of carbon-13 MAS NMR is explored to study the discotic columnar mesophases. The method is reported to have the advantage of not requiring isotopic labeling, of being site selective and hence can report on both overall molecular motions as well as conformational rearrangement.

Carbon, Deuterium

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Chiral discrimination in the [super 13]C and [super 2]H NMR of the crown and saddle isomers of nonamethoxy-cyclotriveratrylene in chiral liquid-crystalline solutions

Article Abstract:

The [super 13]C and [super 2]H NMR spectra of the crown and saddle isomers of nonamethoxy-cyclotriveratrylene in chiral liquid-crystalline solutions are described. The findings show that the chiral discrimination is due to the different ordering of the two enantiomers.

Analysis, Usage, Chirality, Nuclear magnetic resonance, Enantiomers

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